I need to run some 10mm copper pipe through some steel bulkheads on a
boat, I need the equivalent of some cable glands but I'm not sure what
they're called really. Can anyone advise please.

I *could* use cable glands (I have some suitable size ones already)
and in fact they might be better where I want a bit of give but
there's a couple of places where I want the pipe to be rigidly held in
place.

In fact a fitting where one side is 10mm compression and the other
side is a screw fitting of some sort would be perfect for a couple of
places because one side of the bulkhead will be 10mm copper and the
other side will have a flexible connected to it.

--
Chris Green